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Diffstat (limited to 'gcc-4.8.1/libgo/go/syscall/sockcmsg_unix.go')
-rw-r--r--gcc-4.8.1/libgo/go/syscall/sockcmsg_unix.go113
1 files changed, 0 insertions, 113 deletions
diff --git a/gcc-4.8.1/libgo/go/syscall/sockcmsg_unix.go b/gcc-4.8.1/libgo/go/syscall/sockcmsg_unix.go
deleted file mode 100644
index 951bc18fc..000000000
--- a/gcc-4.8.1/libgo/go/syscall/sockcmsg_unix.go
+++ /dev/null
@@ -1,113 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build darwin freebsd linux netbsd openbsd
-
-// Socket control messages
-
-package syscall
-
-import (
- "runtime"
- "unsafe"
-)
-
-// Round the length of a raw sockaddr up to align it propery.
-func cmsgAlignOf(salen int) int {
- salign := int(sizeofPtr)
- // NOTE: It seems like 64-bit Darwin kernel still requires 32-bit
- // aligned access to BSD subsystem.
- if darwinAMD64 {
- salign = 4
- }
- // NOTE: Solaris always uses 32-bit alignment,
- // cf. _CMSG_DATA_ALIGNMENT in <sys/socket.h>.
- if runtime.GOOS == "solaris" {
- salign = 4
- }
- if salen == 0 {
- return salign
- }
- return (salen + salign - 1) & ^(salign - 1)
-}
-
-// CmsgLen returns the value to store in the Len field of the Cmsghdr
-// structure, taking into account any necessary alignment.
-func CmsgLen(datalen int) int {
- return cmsgAlignOf(SizeofCmsghdr) + datalen
-}
-
-// CmsgSpace returns the number of bytes an ancillary element with
-// payload of the passed data length occupies.
-func CmsgSpace(datalen int) int {
- return cmsgAlignOf(SizeofCmsghdr) + cmsgAlignOf(datalen)
-}
-
-func cmsgData(h *Cmsghdr) unsafe.Pointer {
- return unsafe.Pointer(uintptr(unsafe.Pointer(h)) + SizeofCmsghdr)
-}
-
-// SocketControlMessage represents a socket control message.
-type SocketControlMessage struct {
- Header Cmsghdr
- Data []byte
-}
-
-// ParseSocketControlMessage parses b as an array of socket control
-// messages.
-func ParseSocketControlMessage(b []byte) ([]SocketControlMessage, error) {
- var msgs []SocketControlMessage
- for len(b) >= CmsgLen(0) {
- h, dbuf, err := socketControlMessageHeaderAndData(b)
- if err != nil {
- return nil, err
- }
- m := SocketControlMessage{Header: *h, Data: dbuf[:int(h.Len)-cmsgAlignOf(SizeofCmsghdr)]}
- msgs = append(msgs, m)
- b = b[cmsgAlignOf(int(h.Len)):]
- }
- return msgs, nil
-}
-
-func socketControlMessageHeaderAndData(b []byte) (*Cmsghdr, []byte, error) {
- h := (*Cmsghdr)(unsafe.Pointer(&b[0]))
- if h.Len < SizeofCmsghdr || int(h.Len) > len(b) {
- return nil, nil, EINVAL
- }
- return h, b[cmsgAlignOf(SizeofCmsghdr):], nil
-}
-
-// UnixRights encodes a set of open file descriptors into a socket
-// control message for sending to another process.
-func UnixRights(fds ...int) []byte {
- datalen := len(fds) * 4
- b := make([]byte, CmsgSpace(datalen))
- h := (*Cmsghdr)(unsafe.Pointer(&b[0]))
- h.Level = SOL_SOCKET
- h.Type = SCM_RIGHTS
- h.SetLen(CmsgLen(datalen))
- data := uintptr(cmsgData(h))
- for _, fd := range fds {
- *(*int32)(unsafe.Pointer(data)) = int32(fd)
- data += 4
- }
- return b
-}
-
-// ParseUnixRights decodes a socket control message that contains an
-// integer array of open file descriptors from another process.
-func ParseUnixRights(m *SocketControlMessage) ([]int, error) {
- if m.Header.Level != SOL_SOCKET {
- return nil, EINVAL
- }
- if m.Header.Type != SCM_RIGHTS {
- return nil, EINVAL
- }
- fds := make([]int, len(m.Data)>>2)
- for i, j := 0, 0; i < len(m.Data); i += 4 {
- fds[j] = int(*(*int32)(unsafe.Pointer(&m.Data[i])))
- j++
- }
- return fds, nil
-}